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CVE-2026-15711 is a resource-allocation and protocol-validation flaw in libsoup's SoupWebsocketConnection WebSocket frame parser. The implementation does not correctly enforce RFC 6455 control-frame payload-length requirements: control frames, including PING, PONG, and CLOSE, must not contain payloads larger than 125 bytes. Processing a non-compliant oversized control frame causes an internal crash rather than immediate protocol-error handling and connection termination.
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No public exploit code observed for this vulnerability.
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29 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A libsoup WebSocket protocol-handling vulnerability in SoupWebsocketConnection whereby oversized control frames can cause remote denial of service.
A libsoup SoupWebsocketConnection flaw in which an oversized WebSocket control frame protocol violation can cause remote denial of service.
A network-accessible, low-complexity vulnerability in libsoup packages on Miracle Linux 8 that can cause high availability impact, according to the supplied CVSS v3 vector.
A remotely exploitable, low-complexity vulnerability requiring no privileges or user interaction, with high availability impact, addressed for libsoup and libsoup-devel on Miracle Linux 9.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.